source: trunk/source/processes/electromagnetic/lowenergy/test/fluoTest/src/XrayFluoPrimaryGeneratorAction.cc@ 1201

Last change on this file since 1201 was 1199, checked in by garnier, 16 years ago

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25//
26//
27// $Id: XrayFluoPrimaryGeneratorAction.cc
28// GEANT4 tag $Name: xray_fluo-V03-02-00
29//
30// Author: Elena Guardincerri (Elena.Guardincerri@ge.infn.it)
31//
32// History:
33// -----------
34// 28 Nov 2001 Elena Guardincerri Created
35//
36// -------------------------------------------------------------------
37
38#include "XrayFluoPrimaryGeneratorAction.hh"
39#include "G4DataVector.hh"
40#include "XrayFluoDetectorConstruction.hh"
41#include "XrayFluoPrimaryGeneratorMessenger.hh"
42#include "XrayFluoRunAction.hh"
43#include "G4Event.hh"
44#include "G4ParticleGun.hh"
45#include "G4ParticleTable.hh"
46#include "G4ParticleDefinition.hh"
47#include "Randomize.hh"
48#include "XrayFluoAnalysisManager.hh"
49#include "XrayFluoDataSet.hh"
50
51//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
52
53XrayFluoPrimaryGeneratorAction::XrayFluoPrimaryGeneratorAction(
54 XrayFluoDetectorConstruction* XrayFluoDC)
55 :XrayFluoDetector(XrayFluoDC),rndmFlag("off"),
56 beam("off"),spectrum("off"),isoVert("off")
57{
58 G4int n_particle = 1;
59 particleGun = new G4ParticleGun(n_particle);
60
61 //create a messenger for this class
62 gunMessenger = new XrayFluoPrimaryGeneratorMessenger(this);
63 runManager = new XrayFluoRunAction();
64
65 // default particle kinematic
66
67 G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();
68 G4String particleName;
69 G4ParticleDefinition* particle
70 = particleTable->FindParticle(particleName="e-");
71 particleGun->SetParticleDefinition(particle);
72 particleGun->SetParticleMomentumDirection(G4ThreeVector(0.,0.,1.));
73
74 particleGun->SetParticleEnergy(50.*MeV);
75 G4double position = -0.5*(XrayFluoDetector->GetWorldSizeZ());
76 particleGun->SetParticlePosition(G4ThreeVector(0.*cm,0.*cm,position));
77
78}
79
80
81//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
82
83XrayFluoPrimaryGeneratorAction::~XrayFluoPrimaryGeneratorAction()
84{
85 delete particleGun;
86 delete gunMessenger;
87 delete runManager;
88}
89
90//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
91
92void XrayFluoPrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
93{
94 //this function is called at the begining of event
95 //
96 G4double z0 = -0.5*(XrayFluoDetector->GetWorldSizeZ());
97 G4double y0 = 0.*cm, x0 = 0.*cm;
98 if (rndmFlag == "on")
99 {y0 = (XrayFluoDetector->GetSampleSizeXY())*(G4UniformRand()-0.5);
100 x0 = (XrayFluoDetector->GetSampleSizeXY())*(G4UniformRand()-0.5);
101 }
102 particleGun->SetParticlePosition(G4ThreeVector(x0,y0,z0));
103
104 //randomize starting point
105 if (beam == "on")
106 {
107 G4double radius = 0.5 * mm;
108 G4double rho = radius*std::sqrt(G4UniformRand());
109 G4double theta = 2*pi*G4UniformRand()*rad;
110 G4double position = -0.5*(XrayFluoDetector->GetWorldSizeZ());
111
112 G4double y = rho * std::sin(theta);
113 G4double x = rho * std::cos(theta);
114
115 particleGun->SetParticlePosition(G4ThreeVector(x,y,position));
116 }
117 //shoot particles according to a certain spectrum
118 if (spectrum =="on")
119 {
120 G4String particle = particleGun->GetParticleDefinition()
121 ->GetParticleName();
122 if(particle == "proton"|| particle == "alpha")
123 {
124 G4DataVector* energies = runManager->GetEnergies();
125 G4DataVector* data = runManager->GetData();
126
127 G4double sum = runManager->GetDataSum();
128 G4double partSum = 0;
129 G4int j = 0;
130 G4double random= sum*G4UniformRand();
131 while (partSum<random)
132 {
133 partSum += (*data)[j];
134 j++;
135 }
136
137 particleGun->SetParticleEnergy((*energies)[j]);
138
139 }
140 else if (particle == "gamma")
141 {
142 const XrayFluoDataSet* dataSet = runManager->GetGammaSet();
143
144 G4int i = 0;
145 G4int id = 0;
146 G4double minEnergy = 0. * keV;
147 G4double particleEnergy= 0.;
148 G4double maxEnergy = 10. * keV;
149 G4double energyRange = maxEnergy - minEnergy;
150
151 while ( i == 0)
152 {
153 G4double random = G4UniformRand();
154
155 G4double randomNum = G4UniformRand()*5.0E6;
156
157 particleEnergy = random * energyRange;
158
159 if ((dataSet->FindValue(particleEnergy,id)) > randomNum)
160 {
161 i = 1;
162
163 }
164 }
165 particleGun->SetParticleEnergy(particleEnergy);
166 }
167 }
168
169 if (isoVert == "on")
170 {
171 G4double rho = 1. *m;
172 //theta in [0;pi/2]
173 G4double theta = (pi/2)*G4UniformRand();
174 //phi in [-pi;pi]
175 G4double phi = (G4UniformRand()*2*pi)- pi;
176 G4double x = rho*std::sin(theta)*std::sin(phi);
177 G4double y = rho*std::sin(theta)*std::cos(phi);
178 G4double z = -(rho*std::cos(theta));
179 particleGun->SetParticlePosition(G4ThreeVector(x,y,z));
180
181 G4double Xdim = XrayFluoDetector->GetSampleSizeXY();
182 G4double Ydim = XrayFluoDetector->GetSampleSizeXY();
183
184 G4double Dx = Xdim*(G4UniformRand()-0.5);
185
186 G4double Dy = Ydim*(G4UniformRand()-0.5);
187
188 particleGun->SetParticleMomentumDirection(G4ThreeVector(-x+Dx,-y+Dy,-z));
189
190 }
191#ifdef G4ANALYSIS_USE
192
193 G4double partEnergy = particleGun->GetParticleEnergy();
194 XrayFluoAnalysisManager* analysis = XrayFluoAnalysisManager::getInstance();
195 analysis->analysePrimaryGenerator(partEnergy/keV);
196
197#endif
198
199 particleGun->GeneratePrimaryVertex(anEvent);
200}
201
202//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
203
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